Car-replacer



(No Model.) H. BLOMSHIELD.

GAR REPLAGER.

PatentedAug. 8, 1893.

UNITED STATES PATENT OFFICE.

JOHN H. BLOMSHIELD, OF WEST BAY CITY, MICHIGAN.

CAR-REPLACER.

SPECIFICATION forming part of Letters Patent No. 502,806, dated August8, 1893. Application filed January 13, 1893. Serial No. 458,246. (Nomodel.)

To all whom it may concern.-

Be it known that 1, JOHN H. BLo sHIELD,

a citizen of the United States, residing at West Bay City, in the countyof Bay and State of Michigan, have invented certainlne w and usefulImprovement in Wrecking -Frogs or Oar-Replacers, of which the followingis a specification.

, This invention relates to certain new and useful improvements in thatclass of devices known as wrecking frogs and more particularly as carreplacers.

The object of the invention is to provide a simple and inexpensivedevice of such improved construction as to be capable of ready andconvenient attachment to and detachment from the main rails;furthermore,means by which the device may be securely clamped in any of its adjustedpositions.

A further object is to employ such peculiar and novel mechanism wherebythe device may be secured on rails having webs of varying thickness.

With these and other objects in' view, the invention comprises variousnovel arrangements ofparts and details of construction which will behereinafter more fully set forth and specifically pointed out in theclaim.

In describing the invention in detail reference is had to theaccompanying drawings forming part of this specificatiomwhereirl likeletters indicate corresponding parts in the several views, in which YFigure 1 is a view in perspective of one form of device constructed andarranged to embody my improvements. Fig. 2 is a top plan view, showingthe cam engaging the web of the rail, parts being broken away to moreclearly show the operation of the same. Fig. 3 is a view in sideelevation showing the de vice in position on a rail preparatory toclamping. Fig. 4: is a transverse sectional view taken on the line acacof Fig. 3, and showing by full lines the cam disengaged and by dottedlines the position when engaging the rail. Fig. 5 is a detail view incross section of the replacer rail or guide bar, taken on the line oc,0c of Fig. 1.

. In the drawings: A denotes a wellknown form of T-rail, .B a shoe orclip which is adapted to be clamped thereon, and

on which may C the replacer rail or guide-bar, pivotally connected withthe shoe above and centrally of the main rail by the bolt c so as toswing or be readily adjustable about avertical axis. The free end ofthis rail may be tapered or pointed to bite into the ties of theroad-bed and thus prevent-movement or play when in operation.

The shoe B is provided with a clamp ing lip or flange -bwhich, when theshoe is in proper position on the rail, (Fig. 4) hugs or'clasps the headthereof, the extreme edge of the lip abutting against the web as at a".The body portion of the shoe is slotted at -,-a to receive a cam D-which is rotatably mounted therein on a SGI6W-bOlt'-Cb This boltispassed through coincident openings a -d of the shoe and cam and entersthe threaded aperture a of the shoe; thus should the cam become worn,fractured or broken, the bolt maybe readily removed and a vnew pieoesubstituted. The cam is preferably formed with two arms 'Td fd havingtheir outer ends beveled and milled or otherwise roughened to securefrictional engagement with the web of the rail under all conditions.Formed at right 'angles to these arms is asquared head or projection d,

be fitted the socketed end of an operating lever for throwing the caminto or out of engagement with the rail, or the projection may be forcedaround by blows from a hammer or other suitable tool. 7 Owing to theinclination or bevel given the ends of these arms, the shoe may besecurelyclamped on rails having webs varying in thickness.

To prevent the wheels of the cars or locomotives from cutting across orclimbing over the rail, the tread of the latter is rounded to anapproximately oval form (see Fig. 5;) which also decreases the tendencyof the wheels to shove or topple over sidewise and thereby reduces thepressure on the pivotal bolt as the bearing of the flanges of the wheelswill be on the lower part of the rail.

The operation is as follows: The peculiar form of double cam enables theoperator to secure the shoe on either sideof the rail and after beingproperly placed in position, the projecting. head of tllG'CELlll isgiven a partial revolution, which brings one of the beveled IOO camfaces into contact With the Web of the rail. As the Wheels of thederailed car hegin to climb the guide rails the resulting pressure onthe shoe tends to drive it forward and the cam revolving about thevertical axis moves in the opposite direction until the engaging facebecomes firmly wedged and checks further novement of the shoe.

I am aware that prior to my invention, car replacers have been and arenow in use comprising a shoe, an adjustable rail and an eccentric orWedge fastening attachment. I therefore disclaim all such construction.

Having fully described my invention, what- I claim as new, and desire tosecure by Letters 15 Patent, is-

In a car replacer, the combination with a shoe adapted for looselyclasping the rail, of a rotatably mounted cam having two arms, thebeveled and roughened extremities of the :0 arms, the projecting andsquared head of the cam, and the horizontally adjustable rail pivotallysecured on the shoe, as specified.

JOHN H. BLOMSHIELD. [L. s]

\Vitnesses:

bro. (3. HARRIS, C. C. DOUGLAS.

